题目

已知常温下的醋酸铵溶液呈中性，下列叙述正确的是 A. 醋酸铵溶液中水的电离程度与纯水相同 B. 由醋酸铵溶液呈中性可推知NH4HCO3溶液pH＜7 C. 1mol/L醋酸铵溶液中c（CH3COO-）＜1mol/L D. 在99mL的醋酸铵溶液中加入1mL pH=2的盐酸，所得溶液pH=4   答案：C   A. happiness   B. trouble   C. care    D. around    E. other   F. with  G. others    H. lucky   I. lessons    J. to    K. by    L. wrong       Happiness is for everyone. In fact, happiness is always around you if you care about it. When you are in   1  at school, your classmates will help you; when you study hard at your   2 , your parents are always taking good   3  of you; when you get succeed(成功), your friends will say congratulations   4  you; when you do something   5 , people around you will help you correct it; and when you do something good to   6 , you will feel happy, too. All these things are   7 . If you pay attention to them, you can see happiness is always   8  you. Happiness is not the same as money. When you are poor, you can say you are very happy, because people can’t buy happiness   9  money. When you meet problems, you can also say loudly you are very happy, because you have many friends to help you. So you can’t always say you are poor and you have bad luck. If you agree with me, you can be a happy and  10  person.